Work-holder for drilling-machines.



H. BOWEN. WORK HOLDER FOB. DRILLING MACHINES. APPLICATION FILED MAR. 21, 1913 1,093,029. Patented Apr. 14, 1914,

/I/Z/I//V/ of the device.

of the fi nanny BOWEN, or' mcxson,

MICHIGAN, ASSIGNOR TO THE BOLTON company, or

JACKSON, MICHIGAN, AGGMOMEION OF MICHIGAN.

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- Specification of Letters Patent.

Patented a t. it, iota.

application filed March 21, 1913. Serial No. 755,837.

My invention relates to improvements in work holders for drilling machines, and

particularly to holders such as shafting, rods and the like, whereby thesame may be accurately drilled through the axis, and it consists essentially of a base mounted on the drilling machine, parallel upright walls thereon; a block or weight shdable between said walls the base and ends of the weight provided with opposing V grooves, and a ji or guide for a drill in serted in the weig t, and in various features of combination or arrangement, as will more lly appear by reference to the accompanying drawings in which:

Figure 1 is a front elevation of a device em dying my invention. Fig. 2 a side elevation of the same. Fig. 3 a vertical longitudinal section on the 'line 3 3 of Fig. 4. 4. a transverse vertical section on the line H of Fig. 3 and Fig. 5 a plan view for cylindrical work Like numbers refer to like parts in all gures.

1 represents the sleeve carrying the drill spind e of any convenient drilling machine.

f the same.

gu1ded and vertically movable.

3 a suitable .comprislng a base,

Inserted in the block is a sisting' of a suitable hardened steel jig. This guide is mounted in a inter-changeable with other similar guides adapted for other sizes of drills.

Q is a rod adjustable in the base 3 and carrylng a stop 10 on one end to locate the work in the d he base and the over-hanging ends of the block 5 are provided with opposing V The block 5 is preferabl weight whereby it is sufiiciently he clamp the work and hold the same b ity alone. To conveniently operate vice I prefer to connect the block 5 with sleeve of the drill spindle whereby the block is raised when the drill is raised out of the work to automatically release the work, a chain 7 attached to the center of the block at one end and a hook 8 projecting from the sleeve, being shown for the purpose.

at I c aim is 1. A work holder for drilling machines, comprising a base and a weight provided with opposing V grooves, guiding means for v and a drill V groove therein.

2. A work holder for drilling machines, comprising a base, vertical parallel walls on the base, a weight vertically slidable between the walls, the base and weight having opposing V grooves, and a drill jig in the weight communicating with the V groove therein.

3. A work holder y of considerable for drilling machines, parallel vertical walls on e base, the walls and having overhanging ends embracing the ends of the base through the weight radially to the V groove in the ends thereof.

4. A work holding attachment for drilling machines, comprising a base, vertical a weight vertically slidable beparallel guides on the base, aweight slidebly In testimony whereof I afllx my signature engaging the ides, said base and. welght in presence of two witnesses.

being rovide with opposing V grooves a drill jg; in the weight communicating with HARRY BOWEN 5 the V groove therein, and means for attach- Witnesses:

'mg the weight to a vertically movable part 7 WILLIAM W. FISK,

of a drilling machine. CLARNCE O. A. SMITH. 

